One way that you can look for that gene that you want is by making the cut in your plasmid inside of a gene that encodes for some property like resistance to an antibiotic.

一种找到成功重组质粒的方式,是在质粒控制某种特性的编码区域切割,例如,对抗生素的抗性

生物医学工程探索课程节选 : 耶鲁公开课

So being a micro-organism that got a plasmid that give you resistance to an antibiotic would be a good thing - that gave you resistance to something that naturally killed cells like you in your environment would be a good thing.

假如一个微生物,因含有质粒而具有抗生素抗性,这实在是一桩美事--,在同样的环境下,普通细胞会被杀死,而你们这些具有抗性的细胞却安然无恙,这实在太棒了

生物医学工程探索课程节选 : 耶鲁公开课